君子小白

The nickname 'Junzi Xiaobai' implies being polite, gentleman-like ('Junzi'), and naive/newbie('xiaobai'). In a broad term, a gentleman means someone with high ethical quality and respectful demeanor in Confucian culture. 'Xiaobai' often connotes a lack of knowledge or experience but without derogatory sense in modern online lingo. Hence this username portrays politeness with an added trait of being new and eager to learn.